Design Lab- rates of reaction

Design Lab- rates of reaction - • 5 test tubes • 500 cm...

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Design Lab: Rates of Reaction Prompt: Investigate the factors affecting the rate of reaction. Research Question: How does the concentration of hydrochloric acid affect the rate of reaction of zinc and hydrogen chloride? Hypothesis: The concentration of the catalyst would be a fundamental factor in the reaction. Increasing the concentration of the reactants will increase the frequency of collisions between the two reactants. With an increase in the number of collisions more zinc could be reacted in a short amount of time. Therefore the rate of the reaction is dependent on the concentration of the hydrochloric acid in the reaction. Variables: Independent: - concentration of hydrochloric acid Dependent: - the rate of reaction Controlled: - the amount of hydrochloric acid used - Temperature when the reaction takes place - Temperature of the hydrochloric acid - The physical state of the reagents - Specific molar mass of the reagents - Type of water used (i.e.- distilled) Apparatus: Safety glasses
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Unformatted text preview: • 5 test tubes • 500 cm 3 of distilled water • 100 cm 3 of zinc • 500 cm 3 Concentrated Hydrochloric acid (12 mol dm 3 ) • 2 800 cm 3 beaker • 2 graduate cylinder Method: 1. First add 20 cm 3 of concentrated hydrochloric acid into a test tube. 2. Add the 5 cm 3 of zinc into the test tube with the hydrochloric acid. 3. Observe the rate of reaction and time how long it takes for the reaction to finish. 4. Repeat steps 1-3 but now add 10 cm 3 of distilled water into a test tube before the 20 cm 3 of hydrochloric acid id added into the test tube. 5. Repeat steps 1-3 but now add 20 cm 3 of distilled water into a test tube before the 20 cm 3 of hydrochloric acid id added into the test tube. 6. Repeat steps 1-3 but now add 30 cm 3 of distilled water into a test tube before the 20 cm 3 of hydrochloric acid id added into the test tube. Rate of a Reaction Name: Prashanth Rasanayagam Date: Friday, November-28-08 Teacher: Ms.Varnes Course Code: SCH 4U...
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